Adapter for motion-picture-projector lamps.



0. M. SIIEC-K.

ADAPItR FOR MOTION PICTURE PROJECTOR LAMPS.

APPLICATION FILED AUG.3I I917.

Patented Feb. 19, 1918 Z SHEETS-SHEET 1.

0. M. SHECK.

ADAPItR FOR MOTION PICTURE PROIECTOR LAMPS APPLICATION FILED AUG.3X| 1917.

Pawnted Feb. 19, 1918.

2 SHEETS-SHEET 2.

snap a OSCAR SHECK, Q]? CLEVELAND, OHIO, .A SSIGNOR TO THE ARGUS LAMP AND I APPLIANCE COMPANY, OF GLEVELAND,.OHIO.

ADAPTER'FOR MOTION-PICTURE-PROJECTOR LAMPS.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed August 31, 1917. Serial 0. 189,233.

To all whom it may concern:

Be it known that I, OSCAR M. SHECK, a citizen of the United States, residing at Cleveland,-in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Adapters for Motion-Picture-Projector Lamps, of wlilch the following is a specification.

This invention relates to an auxiliary lamp housing for incandescent lamps, or more specifically for Mazda lamps, that is adapted to be attached to the lamp houses in common use in connection with motion picture machines, thereby providing means for changing from an arc-lamp to a Mazda-lamp equipment.

Mazda, motion picture projector lamps have now beenproven thoroughly reliable and economical under actual working conditions. They provide better screen illumination than practically all alternating-current arc-lamps, and are generally more eflicient for projecting motion pictures. Motion picture apparatus at present in univer sal use embodies lamp houses designed for arc-lamps, and the primary object of the present invention is to provide a p nt/sisal adapter whereby any motion picturetheater using a carbon arc projecting machine can be equipped for using Mazda pro ector lamps without any material change or alteration of the apparatus. The arc-lamp hous ing remains intact, and very little time is required to attach the universal adapter to said housing.

At the present time I havescveral applications pending in the Patent Office, for a ppliances adapted particularly to Mazda lamps; therefore a further object of this invention is the provision of a housing particularly adaptable for certain improvements in adiustable lamp carriages which are the subje'ts of my applications now on file and bearing Serial Numbers 1623M and 179,276. With the abo e and other apparent objects in view the invention consists in the construction, combination an arrangement of the parts hereinafter described and pointed out definitely in the claims, reference being had to the accompanying drawings which are made a part of the specification, and in which similar characters of reference are employed to designate similar parts.

Referring to the said drawings, Figure 1 isa side elevation of the improved adapter.

Fig. 2 is a front elevation.

Fig. 3 is a "ertical section on line 33 and line XX Fig. 2.

Fig. 4 is a transverse section on line 4.4 Fig. 1, and Fig. 5 is a rear view vof the adapter.

The improved adapter, asshown, consists of a sheet metal structure having a floor 1, side walls 2 and 2 and a front Wall 3, the rear of the structure being open. A gable roof- 4 is provided with suitable ventilating openings 4 and a door 5 is prov ded in one of the side walls. The wall 2 is provided with an air chamber 2", and the door 5 is provided with a chamber 5 for the same purpose. The front wall 3 is provided with a projection opening 3", and has transverse bars 6 and 6 attached to the outer face thereof, said bars being parallel and located above and below the opening 3 respectively. Longitudinal grooves 7 are provided in the bars 6 and 6*. A plate 8 adapted to slide in the grooves 7, is provided with two pro- 'jection openings tl and 10, theopcning 9 accommodating-a motion picture projector lens 11, and the opening 1-0 being provided with means adapted for slides used in the projection of motionless pictures or for stereopticon purposes. The sliding member 8 is provided with'a manipulating handle 12 and a stop member 13.

A lamp carriage is mounted within the housing, on a bracket ltw'hich is attached to the floor 1 of the structure. As the carriage shown is the subject of a former application above referred to, and inasmuch as it is not specifically, a part of this invention only so far as an adjustable lamp carriage is claimed in' combination with the other elements, it is not deemed necessary to encumber the prcscnt specification with a detailed description of said carriage. Briefly stating, the lamp carriage is universally adjustable and supports a Mazda lamp 15, a reflector 16, and suitable electrical connections 17 and 18. The carriage is mounted on the bracket 14 and is adjustable in relation to said bracket by the adjusting member 19, protruding from the front housing member 3. V

The sides 2 and 2 are provided with right angle flanges 2 which provide means for attaching the adapter to arc-lamp housings which are a part of the motion picture apparatus at present in common use. Bolt holes 2 and 2 are adapted to register with holes provided in the arc-lamp housings, the said holes accommodating bolts, not shown, for firmly connecting the adapter and said arc-lamp housing.

The irnproved adapter equipped with one of my universally adjustable projector lamp appliances, for which it is particularly adapted, provides an efiicient, convenient and economical means for changing an arclamp motion picture apparatus to a Mazda- -lamp equipment, leaving the lamp house of the former equipment intact for future use with arc-lamps if so desired.

' What I claim and desire to secure by Letters Patent is- 1. An adapter for motion picture projector lamps comprising a housing open in the rear and having a projection aperture in the front, a slidable member adapted to be operated in frontof said aperture, a lamp carriage adj ustably mounted in said housing, and means for attaching said housing to a lamp house adapted for arc-lam s. I

2. A device for adapting arc-i amp motion picture apparatus to use with incandescent lamps, comprising a housin open in the rear and suitably ventilate the front of I said housing being provided with a projection aperture, means for attaching the open side of the housing to the arc-lamp house, a slidable combination projection lens carrier operative in front of the projection aperture, a lamp carriage adjustably mounted in the housing, and means for adjusting said carriage relative to said housing.

3. A device for adapting arc-lamp motion picture apparatus to use with incandescent lamps, comprising a housing open in the rear and having a projection aperture in the fro'nt, means for attaching the rear of said housing to the arc-lamp house, a slidable combination projection lens carrier operative in front of the projection aperture, means for sliding said carrier, and a'lamp carriage mounted in said housing.

4:. A device for adapting arc-lamp motion picture apparatus to use with incandescent In testimony whereof I afiix my signature.

OSCAR M. SHECK. 

